PLANTS AND ANIMALS 



225 



than with plants, and he beheved them to be 

 "outside the Hmitsof the vegetable kingdom." 

 This separation bvDeBary was made without 

 reference to a nitrogenous membrane, which 

 may, however, be considered the crucial diag- 

 nostic character. 



Another set of organisms, with apparently 

 naked protoplasm during the vegetative 

 stage, are the endophytic parasites belonging 

 to the group 

 of genera 

 repres e n t e d 

 by Synchyt- 

 rium, Woro- 

 nina, Olpidi- 

 opsis, Rozel- 

 la and Rees- 

 ia. Whether 



thev ever ^^S- 28.— An amoeba (Anioeba proteus). 

 J The clear spot is a pulsating vacuole. Greatlv 



possess any enlarged. (After Leidy.) 



demonstrable nitrogenous envelope has not 

 been ascertained, but it is known with much 

 certainty that they have no cellulose envelope; 

 they are, therefore, not plants, and must, in 

 consequence, be animals. This disposition of 

 them has already been made by Zopf on the 

 ground that a "plasmodial character of the 

 vegetative condition is entirely foreign to the 

 Eumycetes." The Chytridiaceae, which are 



